G29 efi

gag144 · 03-23-2018, 02:50 PM

My G29 EFI cuts out above above 4000rpm. I have changed fuel filter, fuel injector and tested fuel pressure. All linkages look good. There are no fault codes when I download. I am stumped where to go next.

Dave in VA · 03-23-2018, 04:36 PM

Rev limiter?

Chilly · 03-24-2018, 08:26 PM

Cuts out like sputters and misses, or turns off? Does it pick back up after engine slows?

gag144 · 03-27-2018, 03:54 PM

Hesitates / sputters above 4000. It regains itself if I back off below 4000.
Fuel pump pressure is good (40psi), I tried a new electronic control unit and I ohm checked the sensors per the tech data. Throttle linkage is correct and fuel injector and fuel filter are new. I figure it is the scheduling of spark or fuel. I am thinking the crankshaft position sensor...which the engine needs to be removed to replace it according to the manual.

Skoal82 · 03-27-2018, 03:56 PM

Is it supposed to rev above 4000 rpm?

Chilly · 03-27-2018, 04:14 PM

I'm also wondering about rev limiter? Some limiters retard the timing to keep engine from exceeding limit (effectively killing power), others interrupt the ignition like a stutter box so it'll crackle and stumble and sound awful while up against the limiter. I'm referring to automotive and motorcycle. I have no idea if your cart has a rev limiter but since its EFI I'd say it would be completely logical that it would. A few lines of code in the ECU is cheap insurance to help ensure longevity of the engine.

HBR · 03-28-2018, 12:17 PM

Before you do anything more I would find out when the rev limiter kicks in. 4K seems like a reasonable number.

I have a feeling you have spent alot of time, money and effort trying to fix something that isnt broken.

03-23-2018, 02:50 PM	#1
gag144 Not Yet Wild Join Date: Mar 2018 Posts: 2	G29 efi My G29 EFI cuts out above above 4000rpm. I have changed fuel filter, fuel injector and tested fuel pressure. All linkages look good. There are no fault codes when I download. I am stumped where to go next.
gag144 Not Yet Wild Join Date: Mar 2018 Posts: 2

03-23-2018, 04:36 PM	#2
Dave in VA maintaining a low profile Join Date: Oct 2009 Location: SW Virginia USA Posts: 6,316	Re: G29 efi Rev limiter?

03-24-2018, 08:26 PM	#3
Chilly Getting Wild Join Date: Mar 2018 Location: W PA Posts: 123	Re: G29 efi Cuts out like sputters and misses, or turns off? Does it pick back up after engine slows?

03-27-2018, 03:54 PM	#4
gag144 Not Yet Wild Join Date: Mar 2018 Posts: 2	Re: G29 efi Hesitates / sputters above 4000. It regains itself if I back off below 4000. Fuel pump pressure is good (40psi), I tried a new electronic control unit and I ohm checked the sensors per the tech data. Throttle linkage is correct and fuel injector and fuel filter are new. I figure it is the scheduling of spark or fuel. I am thinking the crankshaft position sensor...which the engine needs to be removed to replace it according to the manual.
gag144 Not Yet Wild Join Date: Mar 2018 Posts: 2

03-27-2018, 03:56 PM	#5
Skoal82 Gone Wild Join Date: Mar 2015 Location: Central mn Posts: 1,036	Re: G29 efi Is it supposed to rev above 4000 rpm?

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03-27-2018, 04:14 PM	#6
Chilly Getting Wild Join Date: Mar 2018 Location: W PA Posts: 123	Re: G29 efi I'm also wondering about rev limiter? Some limiters retard the timing to keep engine from exceeding limit (effectively killing power), others interrupt the ignition like a stutter box so it'll crackle and stumble and sound awful while up against the limiter. I'm referring to automotive and motorcycle. I have no idea if your cart has a rev limiter but since its EFI I'd say it would be completely logical that it would. A few lines of code in the ECU is cheap insurance to help ensure longevity of the engine.

03-28-2018, 12:17 PM	#7
HBR Gone Wild Join Date: Jun 2016 Posts: 623	Re: G29 efi Before you do anything more I would find out when the rev limiter kicks in. 4K seems like a reasonable number. I have a feeling you have spent alot of time, money and effort trying to fix something that isnt broken.
HBR Gone Wild Join Date: Jun 2016 Posts: 623